Block-mold.



No. 767,418. PATENTED AUG. 16, 1904.

J. G. MILLER.

BLOCK MOLD.

APPLIOATION FILED JAN. 29, 1904. NO MODEL.

gumauloz UNITED STATES JOHN C. MILLER, OF JACKSON, MICHIGAN, ASSIGNOR OF ONE-'HALF TO Patented August 16, 1904.

PATENT Orricn.

JAMES H. HUNTINGTON, OF JACKSON, MICHIGAN.

BLOCK-MOLD.

SPECIFICATION forming part of Letters Patent No. 767,418, dated August 16, 190% Application filed January 29,1904. Serial No. 191,090. (No model. v

To all whom it may concern:

Be it known that I, J OI-IN C. MILLER, a citizen of the United States, residing at Jackson, in the county of Jackson and State of Michigan, have invented new and useful Improvements in Block-Holds, of which the following is a specification.

This invention is particularly a modification and improvement of the block-molding machine for which I obtained Letters Patent N 0. 744,970.

It is characterized by improvement with respect to the rectangular frame, which is hinged at all corners, so that it will freely open clear of the block even when a rough or tooled stone pattern is used instead of a smooth pattern.

Improvement is further designed with respect to the core and the means for removing the same; also, in various other details, as will be more fully apparent hereinafter.

The article is illustrated in the accompanying drawings, in which- Figure 1 is a side elevation of the mold with the panels removed. Fig. 2 is a top plan View thereof with the core in place. Fig. 3 is a longitudinal vertical section. Fig. 4 is a vertical cross-section, and Figs. 5 and 6 are details in perspective of the core-sections separated.

The frame of the mold consists of two skeleton sections which form a parallelogram, each section comprising side bars 6 and end bars 6, which are hinged together at diagonally opposite corners, as at 6". The sections so produced are hinged together at one of the other corners by extended hinges 7, and the resulting construction is such that the mold will open away from the block at all points. The hinge-pintle is a bolt 8, fixed to an arm 9, projecting from the bed-plate 10, which fits under the bottom of the frame. Lugs 11 project from the lower bars of the frame and contact with the side edges of the bed-platewhen the mold is closed.

At a bottom board is indicated, which rests upon the bed-plate and'which is serviceable in carrying the block after the mold is removed therefrom.

At 8 a collar on the pintle is indicated to adjust the height of the sections to the thickness of the bottom board. Different collars may be substituted for use with different bottom boards.

The skeleton construction of the frame-sections produces openings in which are fitted .side and end panels, as indicated at 12, the

panels being retained in place by bolts which are put through between lugs 14, projecting from the vertical bars of the frame-sections. The sections are held closed by a spring-latch '16, diagonally opposite to the hinge 7.

The core is made in three sectionsa middle section and side sections 21. The middle section is wedge-shaped, as shown, with its apex down, and fits between the inclined sides of the side sections, acting to permit the side sections to contract or draw together when it is withdrawn. It is provided at the top with a handle 20", whereby it may be manipulated, and .has at the end guide-ribs 24, which work between flanges on the ends of the side sections. Said side sections are connected by springs 22, which extend across through the middle sections. The middle section also has lugs 20, which when the section is lifted engage under the top of the side sections and lift the same out of the block. This construction enables the core to be removed without disturbing the molded block. In operation the core is set in place before the material is put in. When the core is to be removed, the middle section is lifted, and when so lifted the springs 22 draw the side sections together, thus detaching them from the mold-block. Further lift removes the whole core without disturbing the block. The frame is then opened on its hinges and the block removed on the bottom board to dry. The removable panels permit any desired change in the size or configuration of the block by the substitution of figured or designed panels, as desired.

It will be seen that the mechanism is simple and its operation easy. The mold may be used continuously, as the blocks may be removed as soon as made and the sides may be swung clear of the block without Waiting for it to become solid. The core being collapsible 3. In a mold, a core comprising side sections having guide-flanges at the ends, a movable wedge-shaped middle section having ribs at the ends which engage said flanges, and lugs which engage the side sections when the core is drawn.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

vJOHN C. MILLER.

Witnesses:

J. T. HANNACOND, C. N, MANLY. 

